Move remaining functionality from ClassWorld to ClosedWorld

pkg/compiler/lib/src/js_backend/backend.dart

Index: pkg/compiler/lib/src/js_backend/backend.dart
diff --git a/pkg/compiler/lib/src/js_backend/backend.dart b/pkg/compiler/lib/src/js_backend/backend.dart
index acc0edc13f962e6c8f114194b1719532d32e4ba2..4bcffaed7e3cfbb4cd355f1acf5860af78935faa 100644
--- a/pkg/compiler/lib/src/js_backend/backend.dart
+++ b/pkg/compiler/lib/src/js_backend/backend.dart
@@ -925,7 +925,7 @@ class JavaScriptBackend extends Backend {
     if (elements == null) return false;
     if (elements.isEmpty) return false;
     return elements.any((element) {
-      return selector.applies(element, this) &&
+      return selector.applies(element) &&
           (mask == null ||
               mask.canHit(element, selector, compiler.closedWorld));
     });